In this period of the "swinging sixties" they signed with the Belgrade label PGP RTB (acronym for "Radio Television Belgrade's Gramophone Records Production") who released three EP vinyls from 1964-69.

Phil "PGP" Zimmerman says that the Washington Post misquoted him, and he has no regrets over releasing strong crypto, despite speculations that strong crypto may have enabled the authors of the Current Situation to plot their plots.